Support structure for pushbutton radio tuner assembly

Abstract

An extremely rigid support structure for mounting the tuning coils and for guiding the movement of the core carriage, includes a coil case which is a one-piece molded element having integral indicator guide slot and core carriage guide rods, with the guide rods being fastened to the front portion of the structure by means of screws which pass through the front portion and mate with threaded apertures in the guide rod ends which are in abutting relation with the front portion.

I claim: 
     
       1. In the tuner for a radio receiver, a tuning assembly comprising: a plurality of coils for tuning the receiver;   carriage means adapted for reciprocating movement;   drive means for moving the carriage means;   manual control means for controlling the drive means to select a desired frequency;   pushbutton control means for predetermining certain desired frequencies and for selecting one of the predetermined frequencies;   a plurality of tuning coil cores mounted on the carriage means for movement therewith, the movement of the cores being within and coaxial with the coils;   a support structure having a front portion and rear portion, the latter portion including as one portion thereof a one-piece molded housing for receiving all of the tuning coils;   first guide means integral with the housing for guiding the movement of the core carriage;   screw means for fastening the first guide means to the front portion of the support structure, the front portion having apertures for allowing passage of the screw means;   threaded means integral with the first guide means for receiving the screw means, whereby the front-to-back dimension of the support structure remains substantially constant.   
     
     
       2. A tuning assembly according to claim 1 and wherein the outer ends of the first guide means are in abutting relationship with the front portion of the support structure when the screw means are mated with the threaded means. 
     
     
       3. A tuning assembly according to claim 1 and further including an insulating terminal board mounted on the back of the one-piece housing for making electrical contact with the tuning coils housed therein. 
     
     
       4. A tuning assembly according to claim 1 and further including an indicator assembly pivotally and slideably mounted for indicating the particular frequency chosen, and second guide means integral with the housing for guiding the movement of the indicator assembly. 
     
     
       5. A tuning assembly according to claim 4 wherein the second guide means is a formed slot, and further including a bell crank pivotally mounted on a portion of the support structure, and wherein the indicator assembly is pivotally mounted on the bell crank and slideably mounted in the formed slot.